USL3633中文资料NON-ISOLATED BUCK OFFLINE LED DRIVER数据手册UTC规格书

描述 Description

The UTC USL3633 is a high performance, high precision and low cost constant current LED driver for non-isolated buckapplication. The device operates in critical conduction mode and is suitable for 85V~265V universal input offline LED lighting. Itoperates in critical conduction mode, the output current does not change with the inductance and LED output voltage. The UTC USL3633 integrates a 500V power MOSFET. It can achieve excellent constant current performance with very few external components, so the system cost and size are minimized. The UTC USL3633 offers rich protection functions to improvethe system reliability, including LED open circuit protection, LED short circuit protection, VCC under voltage protection, CS resistor short circuit protection and thermal regulation function.

特性 Features

Critical conduction mode operationInternal 500V Power MOSFETUltra low operating currentNo auxiliary winding±5% LED output current accuracyLED short protectionLED open protectionVCC under voltage protectionCurrent sensing resistor short protectionThermal regulation function